drasys.or.matrix.complex
Class RowMajorMatrix

java.lang.Object
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  +--drasys.or.matrix.complex.ComplexContainer
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        +--drasys.or.matrix.complex.Matrix
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              +--drasys.or.matrix.complex.ContiguousMatrix
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                    +--drasys.or.matrix.complex.RowMajorMatrix

Direct Known Subclasses:

DenseMatrix

public class RowMajorMatrix

extends ContiguousMatrix

A dense contiguous row-major matrix of complex values. This storage format matches the 'C' language matrix format. The elements are store contiguously in a single java array. This matrix is efficient for numerical computing, especially row-wise computations. There is more information available about the internal storage format.

References:

Matrix Computations (Johns Hopkins Studies in the Mathematical Sciences)
    Gene H. Golub, Charles F. Van Loan (Contributor) / Paperback / Published 1996
Numerical Recipes in C : The Art of Scientific Computing
    William H. Press, et al / Hardcover / Published 1993
Parallel Algorithms for Matrix Computations
    K.A. Gallivan / Paperback / Published 1990

See Also:

Serialized Form

Inner classes inherited from class drasys.or.matrix.complex.ContiguousMatrix

ContiguousMatrix.Sub

 

Fields inherited from class drasys.or.matrix.complex.ComplexContainer

_epsilon, _globalEpsilon

 

Constructor Summary

RowMajorMatrix(double[][] array)           Constructs a contiguous dense row-major matrix with the same number of rows as 'array'.

RowMajorMatrix(double[][] real, double[][] imag)           Constructs a contiguous dense row-major matrix with the same number of rows as 'real' and 'imag'.

RowMajorMatrix(int sizeOfRows, int sizeOfColumns)           Constructs a contiguous dense row-major matrix with an explicit size.

RowMajorMatrix(int sizeOfRows, int sizeOfColumns, int capacityOfRows, int capacityOfColumns)           Constructs a contiguous dense row-major matrix with an explicit size and capacity.

RowMajorMatrix(MatrixI matrix)           Constructs a contiguous dense column-major matrix with the same number of rows and columns as 'matrix'.

RowMajorMatrix(VectorI vector)           Constructs a square matrix with the 'vector' as the diagonal and zeros.

 

Method Summary
void	addColumn(VectorI vector)           Adds a new column and any non-null elements in vector to the end of the matrix .
void	addRow(VectorI vector)           Adds a new row and any non-null elements in vector to the end of the matrix .
java.util.Enumeration	columnElements(int column)           Returns an enumeration of the non-null elements in a column.
Complex	elementAt(int row, int column)           Returns the value of an element by its row and column index.
Complex	elementAt(int row, int column, Complex results)           Returns the value of an element by its row and column index.
java.util.Enumeration	elements()           Returns an enumeration of the non-null elements in the matrix.
double[][]	getArray()           Returns a new two-dimensional array containing the values in matrix.
int	getColumnIncrement()           Returns the distance between corresponding elements in adjacent columns.
int	getOffset(int row, int column)           Returns an element's offset into the value array.
int	getRowIncrement()           Returns the distance between corresponding elements in adjacent rows.
boolean	isColumnMajor()           Returns true if the matrix is column-major.
boolean	isRowMajor()           Returns true if the matrix is row-major.
java.util.Enumeration	rowElements(int row)           Returns an enumeration of the non-null elements in a row.
void	setCapacity(int capacityOfRows, int capacityOfColumns)           Allocates memory so the matrix can hold this many rows and columns without reallocating memory.
void	setElementAt(int row, int column, ComplexI value)           Sets the value of an element by its row and column index.
void	setSize(int sizeOfRows, int sizeOfColumns)           Sets the number of rows and columns in the matrix.

 

Methods inherited from class drasys.or.matrix.complex.ContiguousMatrix

capacityOfColumns, capacityOfRows, columnVector, diagonalVector, getValueArray, isNull, rowVector, setElements, sizeOfColumns, sizeOfElements, sizeOfRows, sum, sumOfSquaredDifferences, sumOfSquares

 

Methods inherited from class drasys.or.matrix.complex.Matrix

equals, equals, setColumn, setDiagonal, setElements, setRow, sum, sum, sumOfSquaredDifferences, sumOfSquaredDifferences, sumOfSquares, sumOfSquares, toString

 

Methods inherited from class drasys.or.matrix.complex.ComplexContainer

equals, equals, getEpsilon, getGlobalEpsilon, setEpsilon, setGlobalEpsilon

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Constructor Detail

RowMajorMatrix

public RowMajorMatrix(int sizeOfRows,
                      int sizeOfColumns)

Constructs a contiguous dense row-major matrix with an explicit size. All the elements are initialized to zero.

RowMajorMatrix

public RowMajorMatrix(int sizeOfRows,
                      int sizeOfColumns,
                      int capacityOfRows,
                      int capacityOfColumns)

Constructs a contiguous dense row-major matrix with an explicit size and capacity. All the elements are initialized to zero.

RowMajorMatrix

public RowMajorMatrix(double[][] array)

Constructs a contiguous dense row-major matrix with the same number of rows as 'array'. The number of columns will match the longest row in 'array'. Some elements can be missing from 'array' either because a row is null or too short. These elements will be set to zero in the matrix.

RowMajorMatrix

public RowMajorMatrix(double[][] real,
                      double[][] imag)

Constructs a contiguous dense row-major matrix with the same number of rows as 'real' and 'imag'. The number of columns will match the longest row in 'real' and 'imag'. Each complex element gets one component from from 'real' and one from 'imag'
EG: complex[0][0] = (real[0][0],imag[0][0])
Either 'real' or 'imag' can be null, but not both.

RowMajorMatrix

public RowMajorMatrix(MatrixI matrix)

Constructs a contiguous dense column-major matrix with the same number of rows and columns as 'matrix'. If 'matrix' is sparse, the null elements will be set to zero in the new matrix.

RowMajorMatrix

public RowMajorMatrix(VectorI vector)

Constructs a square matrix with the 'vector' as the diagonal and zeros. If 'vector' is sparse, the null elements will be set to zero in the diagonal.

getOffset

public int getOffset(int row,
                     int column)

Returns an element's offset into the value array.

getRowIncrement

public int getRowIncrement()

Returns the distance between corresponding elements in adjacent rows.

getColumnIncrement

public int getColumnIncrement()

Returns the distance between corresponding elements in adjacent columns.

isRowMajor

public boolean isRowMajor()

Returns true if the matrix is row-major.

isColumnMajor

public boolean isColumnMajor()

Returns true if the matrix is column-major.

setSize

public void setSize(int sizeOfRows,
                    int sizeOfColumns)

Sets the number of rows and columns in the matrix. The value of any new elements will be initialized to zero.

setCapacity

public void setCapacity(int capacityOfRows,
                        int capacityOfColumns)

Allocates memory so the matrix can hold this many rows and columns without reallocating memory.

addRow

public void addRow(VectorI vector)

Adds a new row and any non-null elements in vector to the end of the matrix . If 'vector' is null then no new elements will be modified in the new row.

addColumn

public void addColumn(VectorI vector)

Adds a new column and any non-null elements in vector to the end of the matrix . If 'vector' is null then no new elements will be changed in the new column.

setElementAt

public void setElementAt(int row,
                         int column,
                         ComplexI value)

Sets the value of an element by its row and column index.

elementAt

public Complex elementAt(int row,
                         int column)

Returns the value of an element by its row and column index.

Tags copied from interface: MatrixI

Returns:

zero is the element is null

elementAt

public Complex elementAt(int row,
                         int column,
                         Complex results)

Returns the value of an element by its row and column index.

Tags copied from interface: MatrixI

Returns:

zero is the element is null

getArray

public double[][] getArray()

Returns a new two-dimensional array containing the values in matrix. The rows of the array hold the rows of the matrix.

rowElements

public java.util.Enumeration rowElements(int row)

Returns an enumeration of the non-null elements in a row. The Enumeration is free to reuse the same object for each call to 'nextElement', so the contents must be use before getting another element.

Returns:

an enumeration whose elements are mutable and of type 'MatrixElementI'

columnElements

public java.util.Enumeration columnElements(int column)

Returns an enumeration of the non-null elements in a column. The Enumeration is free to reuse the same object for each call to 'nextElement', so the contents must be use before getting another element.

Returns:

an enumeration whose elements are mutable and of type 'MatrixElementI'

elements

public java.util.Enumeration elements()

Returns an enumeration of the non-null elements in the matrix. The Enumeration is free to reuse the same object for each call to 'nextElement', so the contents must be use before getting another element.

Returns:

an enumeration whose elements are mutable and of type 'MatrixElementI'